SCHUNK TRIBOS-RM HSK-E 25 polygonal toolholders are designed for ultra-high-speed micro-machining applications where run-out accuracy, dynamic stability and reduced rotating mass are critical for performance. The HSK-E interface according to DIN 69893 is specifically developed for high-speed cutting (HSC) applications, allowing extremely high spindle speeds while maintaining precision and rigidity.

The TRIBOS clamping system is based on controlled elastic deformation of the internal polygonal profile. Using the TRIBOS SVP device, the clamping diameter is temporarily transformed into a circular shape to allow tool insertion. Once the pressure is released, the holder returns to its original geometry, clamping the tool shank uniformly and without backlash. This principle ensures a run-out below 0.003 mm at 2.5 x D, providing high precision and repeatability.

The extremely compact design combined with the anchor structure ensures high radial rigidity, even when using small diameter tools. The HSK-E 25 version is optimized for high speeds up to 85,000 rpm, with G2.5 balancing at 25,000 rpm (Umax < 1 gmm), ensuring stable and vibration-free operation suitable for high-quality finishing.

The holders are designed for h6 tool shanks and include an axial adjustment screw for precise tool length presetting. The absence of threaded coolant connections reduces mass and maintains a geometry optimized for high dynamic performance.

This solution is ideal for micro-machining, high-speed machining, precision finishing and applications on HSC machines where extreme accuracy, stability and superior surface quality are required.